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首页> 外文期刊>Contemporary Clinical Dentistry >In vitro evaluation of shear bond strength of orthodontic brackets bonded with different adhesives
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In vitro evaluation of shear bond strength of orthodontic brackets bonded with different adhesives

机译：用不同胶粘剂粘结的正畸托槽的剪切粘结强度的体外评估

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Background: There is necessary of dry operating field for bonding of orthodontic brackets. The presence of moisture can alter the bond strength. Hence, the aim of the present study was to evaluate the shear bond strength of orthodontic brackets with different adhesives. Materials and Methods: In this in vitro study, a total of 100 orthodontically extracted premolars with sound crown structure were divided into 4 equal groups of different primers. Bonding on the buccal surface of all teeth was done after acid etching with upper premolar brackets using different primers followed by light curing. Shear bond strength was evaluated with or without salivary contamination with both adhesives. A shear force for deboning the bracket was done with universal testing machine. The debonded specimens were examined at ×10 magnification to check site of bond failure and remaining adhesive on tooth using adhesive remnant index (ARI). The obtained data were statistically evaluated using SPSS 20 for Windows (SPSS Inc., Chicago, IL, USA) using ANOVA, Kolmogorov–Smirnov, and Levene's test at the statistical significance of P Results: Transbond Plus showed higher shear bond strength of 8.92 MPa under dry and 5.65 MPa with saliva contamination over Transbond XT of 7.24 MPa under dry and 2.43 MPa with saliva contamination, respectively. Higher ARI score was found without contamination in both adhesives. Conclusion: Transbond Plus hydrophilic resin had good shear bond strength under both dry and contamination condition compared to hydrophobic Transbond XT resin material.
机译：背景：正畸托槽的粘接需要干燥的手术环境。水分的存在会改变粘合强度。因此，本研究的目的是评估具有不同粘合剂的正畸托槽的剪切粘结强度。材料和方法：在这项体外研究中，将总共100个正畸提取的具有冠状结构的前磨牙分为4组，分别使用不同的引物。使用不同的底漆用上前磨牙托槽进行酸蚀后，将所有牙齿的颊表面粘合在一起，然后进行光固化。评估两种粘合剂在有无唾液污染的情况下的剪切粘合强度。用万能试验机完成使支架去骨的剪切力。使用×××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××使用SPSS 20 for Windows（SPSS Inc.，芝加哥，伊利诺伊州，美国），使用ANOVA，Kolmogorov-Smirnov和Levene's试验对获得的数据进行统计学评估，其统计学意义为P。结果：Transbond Plus显示出较高的剪切粘结强度，为8.92 MPa干燥和5.65 MPa下有唾液污染，Transbond XT为7.24 MPa，分别在干燥和2.43 MPa下有唾液污染。两种胶粘剂均发现较高的ARI得分而没有污染。结论：与疏水性Transbond XT树脂材料相比，Transbond Plus亲水性树脂在干燥和污染条件下均具有良好的剪切粘结强度。

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